Clay-screen.



No. 808,590. PATENTED DEC. 26, 1905. N. ALLEN.

CLAY SCREEN.

APPLICATION FILEED APR. 20. 1905.

2 SHBET$-SHEET l.

Inventor Witnesses Attorney PATENTED DEC. 26, 1905.

N ALLEN CLAY SCREEN. APPLICATION FILED APR. 20. 1905.

2 SHEETS-SHBET 2.

Atto mey Witnesses nnrrn STATES Arnr rrion.

NEAL ALLEN, OF PITTSBURG, KANSAS.

CLAY-SCREEN.

Specification of Letters Patent.

Patented Dec. 26, 1905.

Application filed April 20, 1905- Serial No. 256,583

the following to be a full, clear, and exact doscription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an improved screen adapted for use in screening brick or pottery clay, shale, and other material; and it consists in the construction, combination, and arrangement of devices hereinafter described and claimed.

One object of my invention is to effect improvements in the construction of the screen fabric, whereby the same is composed solely of a plurality of longitudinally disposed wires to increase the durability of the screen and enhance its efficiency.

A further object of my invention is to combine with a screen composed of a plurality of longitudinally disposed screen elements a clearing-brush and means to operate it par allel with said screen elements.

A further object of my invention is to effect improvements in the construction of the screen-frame.

A further object of my invention is to combine with the longitudinally-disposed screenwires improved means to adjust and vary the tension thereof. 2

In the accompanying drawings, Figure 1 is a perspective view of a screen constructed in accordance with my invention. Fig. 2 is a vertical longitudinal sectional view of the same. Fig. 3 is a vertical transverse sectional view of the same, taken on the plane indicated by the line a a of Fig. 2.

In the embodiment of my invention here shown there is a supporting-stand, which may be of any suitable construction and on which the screen-frame 2 is pivotally mounted, as at 3, whereby the inclination of the screen may be varied, as may be desired.

The side pieces 4 of the screen-frame are provided at their ends with notches 5, which receive the ends of the cross end pieces 6 7. The side pieces 4 are further provided at points midway between their opposite edges and near the cross-piece 7 with longitudinal slots 8. A bolt-rod 9 extends through the said slot, is provided with clamping-nuts 10 to bear on the inner and outer sides of the side pieces, and the said bolt-rod is engaged by the eyes of a plurality of eyebolts 11, the shanks of which extend through openings in the cross-piece 7, the nuts 12 of the said eyebolts being adapted to bear upon the outer edge of the said cross-piece. A similar boltrod 13 extends through openings in the side pieces near the cross-piece 6, is provided with clamping-nuts 14, and is engaged by the eyes of a plurality of eyebolts 15, the-shanks of which extend through openings in the crosspiece 6 and have nuts 16, which bear against the outer edge of said cross-piece.

The screen fabric is composed of a plurality of longitudinallyarranged screen-wires 17, which are suitably spaced apart, according to the material to be screened, and are also of suitable thickness. The ends of the said screen-wires are attached to the bolt rods 10 13, preferably by wrapping the wires around said rods, and it will be understood that by the provision of the slots 8 the boltrod 10 is rendered adjustable longitudinally in the screen-frame, so that by appropriately turning the nuts 12 on the eyebolts 11 the latter may be moved endwise, as may be required to tighten or vary the tension of the screen-wires at will. Cross-rods 18 bear under the screen-wires near the bolt-rods 10 13 and are adjustable in transversely-disposed slots 19, with which the side pieces of the screen-frame are provided. The said crossrods are engaged by eyebolts 20, which are disposed in openings 21, with which the side pieces of the frame are provided, and the adjusting-nuts 22 at the outer ends of the said eyebolts 20 are here shown as countersunk in the side pieces 4, where they are out of the way. It will be understood that by appropriately adjusting the cross-rods 19 by means of the eyebolts 20 the tension of the screenwires may be varied, said cross-rods 19 coacting with the adjusting-bolt rod 10 to thus tighten and vary the tension of the screenwires.

The lower side of the upper end portion of the screen is covered with a steel or other suitable metallic sheet-covering 23. On the outer sides of the side pieces 4 of the screenframe, at a suitable distance from the upper ends thereof, are secured a pair of standards 24, which are provided with bearings for a shaft 25. The latter is here shown as provided at one end with a power-wheel 26, whereby it may be rotated, and the said shaft is provided at its center with a crank 27. Near their opposite ends the side pieces 4 of the screen-frame are provided on their outer sides with a pair of standards 29. An oscillating brush 30 has its bearings in the upper ends of the said standards. The said brush is here shown as a brush-head 31, connected, by means of adjusting bolt-rods 32, to a shaft 33, which rocks in the bearings of the standards 29 and is provided with a rockarm 34, which has a plurality of adjustingopenings 35, disposed in longitudinal series. The said rock-shaft and brush-head are perpendicular to the longitudinally disposed screen-wires, and the length of the adjusting bolt-rods is such that the plane of movement of the oscillating brush-head intersects the plane ofthe screen-wires, so that the bristles of the brush are caused to pass longitudinally :between the longitudinally-disposed screenwires at their lower portions. A pitman 36 has its upper end attached to the crank 27 and its lower end detachably connected to the rock-arm 34 by means of a suitable pin 39, and by appropriately inserting said pin in one of the adjusting-openings 35 the extent of the oscillating movement of the brush may be regulated at will. It will be understood that the bolt-rods 32 enable the brushhead to be adjusted readily toward and from the rock-shaft 33 to compensate for wear of the bristles of the brush.

In the operation of my improved screen the clay or other material to be screened is thrown on the upper end thereof and caused to pass by gravity downwardly thereon, the screen being appropriately inclined for this purpose. The major portion, about ninetenths of the clay, passes through the spaces between the longitudinally-disposed screenwires before reaching the lower portion of the screen on which the brush operates.

It will be understood that the action of the brush serves to keep the screen-wires clean and to prevent material from adhering thereto and clogging them. The longitudinal disposition of the screen-wires is also effective to prevent the screen from becoming clogged as the material in its descent on the screen moves parallel with the said screen-wires.

In practical tests to which my improved screen has been subjected the entire efficiency thereof has been demonstrated.

It will be understood that my improved screen is exceedingly light and simple and that it may be readily manufactured at slight cost.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the inven tion will be readily understood without requiringa' more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having. thus fully described my invention, what I claim as new, and desire to secure by Leters Patent, is

1. The herein-described screen comprising a frame having side bars and cross-bars, said side bars being provided with transverse slots, rods extending from side to side of the frame and having their ends disposed in said slots, adjusting-bolts in the side bars of the frame to adjust said rods in said slots transversely with respect to the side bars, longitudinally-movable adjusting-bolts in the crossbars of the frame, rods carried by the lastmentioned adjusting-bolts, and screen-wires attached to said rods and bearing on the transverse adjustable rods, substantially as described.

2. A screen comprising a support, a frame pivotallymounted on said support and adapted to be disposed at any desired inclination, laterally-spaced longitudinal screen-wires in said frame, standards on said frame, a rockshaft mounted in said standards, an oscillating brush operated by said rock-shaft and coacting with the screen-wires, said rock-shaft having a radial arm, standards on the frame, a crank-shaft mounted in the last-mentioned standards, and a pitman connecting the crank of said shaft to the radial arm of the rock-shaft, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

NEAL ALLEY.

Witnesses:

AMos ALLEN, R. C. MORGAN. 

